Collapsible core.



J. K. WILLIAMS.

COLLAPSIBLE CORE. APPLICATION IILED.DEG. 21. 1012.

1,1 05,737. Patented 4, 1914.

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Beit known that" John-K. ,Wnmmms, citizen f the United; States, '1:esid1ng' at Akrbn; h io,vhave inventedcertam new and useful Improvements in, Collepslble Cores, of which the following isfa specification.

- Myyp esent -invention relates to improve nients'in collapsible cores'or mandrels for e manufacturing the outer casings or shoeslof.

- objects to pro double tubed pneumatic)- tires having 'inexl-f tensibleedges. f

The inve'ntion'has among others for Its v'ide a. constructionin which the number of 'partsshall bereduced ton minin'n im. and be capable of. bei quickly and easily-assembled and which w en so as sembled will be held firmlytogetherand accurate alinement.

A further object is tq pl' oyide a core mandrel capable of hemg reddily applied toe a tire 1 building v machine or standin a properly centered condition, so as to rotate true thereon without neeessitatfing any odjiust me'nts. I i I W t t es a dn o j c s in view t structio'n a of parts hereinafter described and P1111101 larly defined by the appended claim.

-' A "core constructed in accordance 'withmy invention illustrated in the accompanying drawings, in which Figure 1' is" aside leyution of the assembled core, and Fig-.- 2 is a' section-on line 2- -2" of "Fig.1.. Fig. 3'is a 'sectionshowing the moldin the core a 'Referringby reference characters-to this drewing, the numeral 1. designates the core .whieh 1s referably made ho to efiectit's-removal -'from' the completed shoe, it is formed of a plurality of partsjl.

which, inthe, assembled form, abut each other toform the complete annularcore, the" line of junction between at least one of these parts andthe adjoining iortions being'on ,li'nes oblique to the radii sdthatjt maybe withdrawn inwardly,- thus allowing the -re maining sections to also. be withdrawn in wardly to effect the removal offthe sections from the completed shoe.

In order that these sections maybe readily assembled in their abutting position; and

nd arrangement and combination clamped together in accurate 'alinementand firmly heldin such position, I provideeach of them' with an inwardly extending flange or rib, These inwardly extending fiangesin the assembled conditiodform a complete anenula-r bead orflunge-2,,which is provided 'on. one side withnn annular 'rib,3 haying the inclined face 3";

' es s s Y. has aninclined face 4fdesigned to poop erate'with the iace 3; the annular project ing portion-of thls l'lllg being designed to rest-in theireces's fol-med bind the said' in: clineli face '3. Thisringe us aliorizontall'y extending} annular ,-flzi11ige which passes inside an anl litular heading 2 pliirelity oi headless, boltsfi; hich" are de signed too-Pass through suitablfl openings'in the ,and are provided on theirouter elnds 'wlth nuts 6, by whi'ch'-the pertsime ormsa seet'for the bolts beini sgermanently carried ":by the core sections .th latterpre easily applied to'the' ringby relative lateralfginoyeihent, and" by reason of the inclined "fulcestd zind-" kthe' tightening of the nuts causes the sections to be drawn by -.th1s single elem ing. firmly againstthe inwardly exten ing ennu 'la'riflange or seat 4 and'thereby be held idly in positionJ .Thenuts 6 are preier set into recesses in-Ithe ring;- and may be 'dly securedto theleore sections area a single fclempingring which firmly drawnitlogether. By feaso'nf'of: the

tightened by an ordinary socket-1 wrencl1 The flan'g'e' l" is prefei'ablyflcarried laterallyto an extent approximately equal to orexceedin'g the length nfthe bolts s'ov that t-he 'prO ectin'g; edge will serve-as a seat and guld for the sections, 'thuspenabling the bolt holes to be more readily brought-into.

,alinement with 'thefblolts." On thesi'de ofthe bending opposite, to where theLnutsare is in. line with, .the edge 4, of the" ring when the latter'is in;place, 'wl1icli parts-formal].

seat 'or guide for the moldsections 8,.

Formed integral; with the ring 4' 5 is a spider comprising arms' 8' and. a central hub.

9 adapted to placed upon the shaft or axleofi a tire'building machine, and this hub may carry an integral gearlO whereby it no I -- 'jtered without requiring adjustment, while the. spider in no way interferes with the placing of the core and tire in a-niold for' Curing.

Instead of having the bolts carried by the core sections, as shown in Figs. land 2, I may have them carried by the ring, as indicated in Fig. 3, and passed through openings inthe core sections, the nuts being seated in recesses in the flange of the beading.

In assembling the' collapsible core above described the bolts in each section are brought into alinexnent with the holes, which is readily accomplished by bringing the edge' of rib 3 into contact with the flange portion 4: of the ring, after which the section may be slid laterally .to cause the bolts to enter the bolt holes. Thereafter the nuts are applied and tightened to draw and hold the section firmly inthe position shown in the drawings, and the inclined faces tending to hold the section firmly against the ringeor flange 4 This operation 1s re- ,.peated='for each successive section until all are in place. In disassembling or collapsing the core after the tire has been formed thereon the nuts are removed and the ring 4" removed from the sections by a lateral movement, after which the wedge shaped section is withdrawn inwardly from, the tire, allow ing the other sections to be also withdrawn. Having thus described my invention what I claim is:

A device of theclass described. comprising a cylindrical supporting member having an outwardly extending flange at one edge, and a plurality of segmental core sections having inner or base portions seating against said supporting member. said inner portions'having laterally extending ribs at one of said parts and passing through openings in the other part. 4

In testimony whereof, I aflix my signature in' presence of two witnesses.

' JOHN K. WILLIAMS.

Witnesses:

J. A. H. MYERS, ANNA TSGHANTZ. 

